lordsummit
moderate mod
Johnny do you have to be so negative all the time?
A new little pair of DIY Monitors....
- Thread starter 3DSonics
- Start date
3DSonics
away working hard on "it"
Hi,
Pretty much so....
If you take one of the smallest, something like the Tangband W3-871 you find that on axis it has a 6db elevated area above around 6KHz and all the way up to 20KHz, while 30 Degrees off axis (which is where you would be in a traditional equal sides triangle stereo setup with the speakers pointed straight forward, rather than toed in) the response is 5db down at 10KHz and nearly 10db down at 20KHz compared to the average SPL.
What it boils down to is that the 3" Fullranger is down 10db at 10KHz compared to the on-axis response at 10KHz! Bigger drivers beam more.
If we take the NeoFone and the ribbon, at 30KHz the ribbon will produce 87db/2.83V/1m SPL, as the SPL rolls off with the first order highpass applied down to below 5KHz we will have an SPL that 6db down on the speakers nominal SPL, which means off axis the ribbon will be louder than the main driver though on axis there will be a slight boost (the NeoFone is pretty flat on top on it's own).
Ciao T
Setting Son said:
Pretty much so....
If you take one of the smallest, something like the Tangband W3-871 you find that on axis it has a 6db elevated area above around 6KHz and all the way up to 20KHz, while 30 Degrees off axis (which is where you would be in a traditional equal sides triangle stereo setup with the speakers pointed straight forward, rather than toed in) the response is 5db down at 10KHz and nearly 10db down at 20KHz compared to the average SPL.
What it boils down to is that the 3" Fullranger is down 10db at 10KHz compared to the on-axis response at 10KHz! Bigger drivers beam more.
If we take the NeoFone and the ribbon, at 30KHz the ribbon will produce 87db/2.83V/1m SPL, as the SPL rolls off with the first order highpass applied down to below 5KHz we will have an SPL that 6db down on the speakers nominal SPL, which means off axis the ribbon will be louder than the main driver though on axis there will be a slight boost (the NeoFone is pretty flat on top on it's own).
Ciao T
